from numpy import ndarray

# for checkers see checkers.check_vaild_arr_type

SamplesF64 = ndarray  # with np.float64 as elements
ChunksSamplesF64 = ndarray  # multidim samples
PDTimestamps = ndarray  # with pd.Timestamp as elements
NPTimestamps = ndarray  # with np.datetime64 as elements
NPBool = ndarray  # with bool as elements
